文章摘要
刘章军,王磊,但庆文,周宜红,田斌.非平稳地震动的广义演变谱模型及在水工抗震中的应用[J].水利学报,2015,46(9):1028-1036
非平稳地震动的广义演变谱模型及在水工抗震中的应用
Generalized evolutionary spectrum of non-stationary ground motion and its applications in seismic design of hydraulic structures
投稿时间：2015-01-06  
DOI：10.13243/j.cnki.slxb.20150023
中文关键词: 非平稳地震动  广义演变谱  水工建筑物  抗震规范  谱表示  随机函数
英文关键词: non-stationary seismic ground motion  generalized evolutionary spectrum  hydraulic structures  seismic design code  spectral representation  random function
基金项目:国家自然科学基金项目(51278282,50808113)
作者单位E-mail
刘章军 三峡大学土木与建筑学院, 湖北宜昌443002
三峡地区地质灾害与生态环境湖北省协同创新中心, 湖北宜昌443002 		liuzhangjun73@aliyun.com 
王磊 三峡大学土木与建筑学院, 湖北宜昌443002
三峡地区地质灾害与生态环境湖北省协同创新中心, 湖北宜昌443002 		 
但庆文 三峡大学土木与建筑学院, 湖北宜昌443002
三峡地区地质灾害与生态环境湖北省协同创新中心, 湖北宜昌443002 		 
周宜红 三峡地区地质灾害与生态环境湖北省协同创新中心, 湖北宜昌443002  
田斌 三峡地区地质灾害与生态环境湖北省协同创新中心, 湖北宜昌443002  
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中文摘要:
      在平稳地震动过程的功率谱密度函数基础上,发展了一类时-频全非平稳地震动过程的广义演变谱模型。广义演变谱模型可以全面地反映地震动的时域特性和频域特性,如强度非平稳性、持续时间、地震动峰值加速度以及频率非平稳性、场地特性和反应谱。结合我国现行的水工建筑物抗震设计规范,确立了广义演变谱模型的参数取值。同时,应用非平稳随机过程模拟的谱表示-随机函数方法,建立了4类场地条件下的水工建筑物抗震设计所用地震动的代表性时程。最后,通过代表性时程的二阶统计值与目标值的比较,以及代表性时程的平均反应谱与规范反应谱的拟合误差,验证了广义演变谱模型的合理性和优越性。
英文摘要:
      Based on the power spectral density function of stationary ground motion,a new model of generalized evolution spectrum of fully non-stationary ground motion process is developed. The model of generalized evolutionary spectrum can be fully represented the time domain and frequency domain characteristics of seismic ground motion process, such as the intensity modulating non-stationary, duration, peak ground acceleration, frequency modulating non-stationary, site characteristics and response spectrum. Combined with Chinese specifications for seismic design of hydraulic structures, the parameters of generalized evolutionary spectrum model are established. Applying the spectral representation and random function approach to simulate non-stationary ground motion process with the generalized evolutionary spectrum, the representative samples of different site categories for seismic design of hydraulic structures are generated. Finally, compared with the second-order statistics of representative samples and the targets, and the average response spectrum and the specification response spectrum, the effectiveness and superiority of the proposed model can be demonstrated.
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